I’m actually not sure why this is happening to your app on pycafe. It doesn’t seem to be happening to other people’s apps. Did you use a particular library or version that’s not commonly used?
I’m sorry for the inconvenience. It appears that the error is occurring in Kaggle’s environment, not on py.cafe. My app uses standard libraries like Dash, Plotly, and dash-ag-grid.
I think, the issue on Kaggle is likely due to a configuration or dependency version difference on their end.